Electronics Forum | Wed Feb 04 21:40:52 EST 2004 | davef
You are 100% correctomuno. It is perfectly reasonable to use screens in printing paste.
Electronics Forum | Wed Feb 04 16:54:04 EST 2004 | mk
Hopefully this is not a stupid questions but, if you are printing low tech surface mount boards, is it possible to print through a mesh screen versus a stencil? Isn't that the way it used to be done? Like soldermask only stainless steel versus polyes
Electronics Forum | Thu Feb 05 17:33:08 EST 2004 | black5629
Yep, did that for many years in the 80's and early 90's. I wonder if their are suppliers that still do the emuslions? Anyone?
Electronics Forum | Thu Feb 05 19:45:33 EST 2004 | davef
Sure, here's one: Micro-Screen; 1106 S High St, South Bend, IN 46001; 574-232-4358 Fax: 574-234-7496; Cathy info@microscreen.org http://www.microscreen.org We list the following company in our notes, but have never used them: SEFAR AMERICA - MEC P
Electronics Forum | Tue Dec 15 12:23:47 EST 2009 | swag
I have moved golden boards from chains to mesh as I got tired of fishing t-couples under the chain rail. I saw a 3-5 deg. decrease on top-side parts peak temp. (all t-couples were on top side). I had to bump zones 6 and 7 a few degrees to make up f
Electronics Forum | Tue May 22 11:03:11 EDT 2007 | Michelle
We now have an AOI in our process after printing and have noticed that all the small aperatures are getting clogged by solder paste. Mainly on all fine pitch parts. We are using Kester ws R562 SN63/PB37 mesh -325+500 90% metal. It was manufactu
Electronics Forum | Tue May 22 12:27:04 EDT 2007 | cyber_wolf
I would consider calling Kester and telling them they need to send their people out. I could not really see mesh size being an issue on anything 20mil and above. There are several other issues that can cause aperture clogging as well...: Incorrect
Electronics Forum | Mon Apr 15 21:27:16 EDT 2002 | djarvis
Everything we do is RF and have had no problems in the last 7 years with - Indium NC-SMQ92J, Sn63 Pb 37, 90.25% Metal, -325+500 mesh. Stencils are always 0.005" thick. However I will qualify that by adding we are an OEM and each new product may requi
Electronics Forum | Wed Oct 28 15:34:45 EST 1998 | carlm
| Can anyone supply me with info on determining the volume of paste left on a pad once reflowed compared to the intial amount put down? Is there a formula or something? | That information should be contained in the technical data sheets supplied by
Electronics Forum | Mon Aug 16 13:38:35 EDT 2010 | rl
i would like to request some advice on manually dispensing paste for super fine pitch components. first some background. i am a small design house and specialize in sub-miniature prototypes for avionics. so far, i have mostly used stainless steel st
.gif)
